Abstract: The present invention relates to an antibody comprising an immunoglobulin heavy chain variable region (VH), an immunoglobulin light chain variable region (VL), an immunoglobulin light chain constant region (CL), an immunoglobulin heavy chain constant region (CH), and two sequences encoding peptide linkers (PL1 and PL2), wherein VH is fused to VL through PL1 and CL is fused to CH through PL2, and its uses for therapeutic or diagnostic purposes. The invention further relates to a recombinant nucleic acid molecule encoding said antibody, and an expression cassette, vector, viral particle, host cell, transgenic organism or pharmaceutical composition comprising said recombinant nucleic acid molecule.

Abstract: Chronic inflammatory diseases are becoming a leading cause of death throughout the world. Although such diseases appear to be clinically different, they share many similarities in terms of genetic background and pathophysiological pathways. There is an interest to develop drugs for inhibiting the CD95-mediated non-apoptotic signaling pathway that contributes to inflammation. In particular, neutralizing anti-CD95L monoclonal antibodies are highly desirable. The inventors a neutralizing anti-CD95L monoclonal antibody (mAb), designated JQ3 (IgG1 K). In particular, the neutralizing effect of JQ3 was confirmed since this home-made monoclonal antibody inhibited the CD95-mediated apoptotic signaling pathway induced in T-cell line Jurkat more efficiently than NOK-1 mAb. Interestingly, JQ3 blocked the CD95-mediated Ca2+ response in neutrophils exposed to sera from various inflammatory conditions (COVID 19 patients and anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis (AAV) patients).

Abstract: The present invention relates to an antibody comprising an immunoglobulin heavy chain variable region (VH), an immunoglobulin light chain variable region (VL), an immunoglobulin light chain constant region (CL), an immunoglobulin heavy chain constant region (CH), and two sequences encoding peptide linkers (PL1 and PL2), wherein VH is fused to VL through PL1 and CL is fused to CH through PL2, and its uses for therapeutic or diagnostic purposes. The invention further relates to a recombinant nucleic acid molecule encoding said antibody, and an expression cassette, vector, viral particle, host cell, transgenic organism or pharmaceutical composition comprising said recombinant nucleic acid molecule.